John c



J. 'C, SHERRY. BOILER HAND HOLE PLATE.

APPLICATION HLED MAY l. I918.

Patented May 20, 1919.

UNITED sTATns rArEnT OFFICE.

JOHN C. SHERRY, OF SEATTLE, WASHINGTON, -AS SIG N-OR TO SHERRY WATER TUBE BOILER 00,, or SEATTLE, wnsnmc'ron,

aconronnrron on wasnrneron. 1

BOILER HAND-HOLE rLA'rn.

Specification of Letter sjlatent.

Application filed May 1, 191-8. Serial -1 T0.;231,7 89.

v citizen of the 'United States, residing at Seattle, the county of King and State of Washington, have invented new and useful Improvements in Boiler Hand-Hole Plates,

of which the following is a specification.

- p anying drawings,

' from the inside of the *boiler,

This invention relates to hand-hole plates or closures to be used connection with boilers, tanks, and the like.

iOne of the objects ofithe presentinvention is to provide a hand-hole plate, particularly adapted as a closuref-or circular handholes,- construction, easy to insert'andwhich will seat on the entire innered ge 0f the opening or on the side Where thepressure is applied. Anotherobjeot of the invention is to pro vide a two-piece hand-hole plate which is easy to insert and readily assembled when inserted. Further objects will hereinafter appear.

the construction and combination of parts as hereinatter more fully described and claimed, havi ng reference to the' aecomin which 7 Figure 1 's a'section of a boiler plate, showing the application "of the closure plate.

isa plan view of same.

Fig. 3 is a sideelevat ion of the 'outerfsection of the plate. v

Fig.4 is a plan View off-same. 1

Fig. 5 is a perspectiveviewflof the inner section of the plate.

Fig- 6 is a view, similar to Fig-.2, ta'ken Referring to the drawings detail/A indicates a boiler plate, in which is formed a circular opening 2,which, in the present instance, is closed by a hand-holeplate generally indicated at B. This plate frms the subject-matter of the present --invention and consists of an inner and an outer head member, such as shown "in Figs. 3, land 5. j'lhe inner member comprises a circular disk 3 having a diameter slightly less than the diameter of the hole 2.

Formed on the inner face of the disk 3 is a pair of segmental lugs 4. Also formed in the plate is a central opening 5, through which passes a bolt 6 secured in the inner head member shown in Fig. 5. This head member also consists of a circular disk 7,

the sides of which are cut away, as at 8. The

which is simple and substantial in cut-away portions are true circles and confo'rmftdthe outer circle or diameter 1 1 of the disk 7. 'lhe' two head members may, therefore, be assembled and will, when so assembled, for-m a-plug or plate consisting of an outer disk 3, having a diameter slightly less than the hole to be plugged, and inner'disk of larger diametertha-n the hole to be plugged, saidlastanamed "disk being formed by the plate 7 and the segmental lu-gs; I

The bolt dis secured in the 'disk' 7 and it is, therefore, comparatively easy 'to'ins'ert the same, as the disk 7 can be turned into ali-nement 'vvith the "lugs 4, thus presenting a diameter slightly less than the hole 2.

rammed May 20,1919;

The two plates are thus easily inserted and a quarter turn of the inner disk 7 immediately brings erablya three legged spider, such as shown This may 'be slottedv on one a at 15, is used. side, as at 16,'-to permit it to he slipped under the nut 14 of the bolt, or it may be provided desired. llhe handfliolaplate is adapted both for small and large openings and may, therefore, be termed not only a hand-hole plate but may "also'b e termed a plug" or pp The materials and finish of the gasket 12 and the "sections forming the hand-hole Pl e ay e such s t e peri an judgment of the manufacturer may (ili'cta'te.

"I wish it understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims and that I do not wish to limit myself to the specific design and construction here shown.

7 Having thus described my. invention, what I claim and desire to secure by Letters Patent is 1. A. hand-hole plate with a single central opening, ifv

for boilers and the it into register with the lugs 1 i 4:, thus permitting it to seat between same The invention oonslsts of the parts andpiece disk thereon to 'and a plate on the like, comprising an inner and an outer head member, said inner head member compris ing a circular disk having a diameter slightly less than the opening to be closed, a pair of segmental lugs forming a portion of said disk, each of said lugs having an outer face forming a portion of a circle of larger diameter than the hole to be closed, an inner head section adapted to be received by the outer head section consisting of a disk having a diameter larger than the opening to be closed and conforming to the circle forming the outer faces of the lugs formed on the outer head, a pair of cut-away portions formed on each side of the inner'head, the faces of said cut-away portions forming sections of circles and also conforming to the inner faces of the lugs formed on the outer head, and a bolt carried by the inner head adapted to draw the head sections in unison against the inner face of the plate in which the hand-hole is formed.

2. A hand-hole closure including a bolt and a pair of sections turnable thereon, one section having a pair of similar'opposite concave portions and the other section havinga pair of similar opposite convex por tions receivable in said respective concave portions.

3. In a hand-hole closure, a bolt, a oneitself fit in the hole, said disk having opposite parts provided with interior convex faces extending within the disk periphery and exterior convex faces extending beyond the disk periphery, bolt having concave parts to receive the interior convex faces of said disk parts and having convex parts to register with the exterior convex faces of the disk parts so that said exterior convex faces of the disk parts and the convex parts of the plate will conjointly form a closure for the hole. 7

4. A hand-hole closure including securing means and members each turnably mounted on said means, said members so as to'be insertible through the hole While on the securing means in one position, and upon relative turningof approximately 90; to conjointly forma closure extending beyond the margin of the hole.

Copies-o! this patent may be obtained for five cents each,

5. A hand-hole closure including members; each having a-pair of similar and op-v being formed positely disposed complementary depressions and projections, and securing means turnably carrying each member whereby said members may be turned while on said securing means through approximately 90 so as to be insertible through the hole in one position and in a second position to conjointly form a closure extending beyond the margin of thehole.

6. A hand-hole closure including securing means and closing means movably mounted on the securing means, said closing means being formed so as to be insertible through the hole in one position and while on the securing means and upon relative turning of approximately 90 to extend beyond the margin of the hole.

7. A hand-hole closure including a bolt and members turnable thereon and being of less width than length so asto allow the members to be turned and to pass through the hole in the direction of their length and then turned through approximately 90 to extend at substantially right angles to each other so as to have their ends extend beyondthe margin of the hole.

8. A hand-hole closure composed of a bolt and a pairof superimposed members each turnably mounted on the bolt and being formed so as to pass through the hole in one position thereof and upon relative turning of approximately 90 to form a complete closure for the hole.

9. A hand-hole closure composed of a bolt and superimposed members movably mounted on the bolt and each having less width than length and formed so that upon relative turning of approximately 90 to provide a complete closure'for the hole. a

10. In a hand-hole closure, securing means, and sectional closing means carried by the securing means and formed so as to be insertible through the hole and then moved through approximately 90 to close the latter.

In testimony whereof I havehereunto set my hand in the presence of two subscribing witnesses.

JOHN G. SHERRY.

,i-Witnesses:

7 JOHN H. HERRING,

I r -W. W. HEALEY.

by addressing the Commissioner of Patents,

Washington, 11.0. 

